🔧 Debug: Interpolated Sliding Window Animation

What to Look For:

• ✅ GOOD: Lines should smoothly grow and slide across the plot
• ✅ GOOD: Each frame should show different X coordinates progressing smoothly
• ✅ GOOD: No jerky discrete jumps - should be continuous motion
• ❌ BAD: Frames don't change (static plot)
• ❌ BAD: Only discrete jumps every many frames

Expected Behavior:

Frame 1: Line starts at x=[0,1,2]

Frame 10: Line has grown to show x=[0,1,2,3] approximately

Frame 20: Line slides to show x=[2,3,4,5] approximately

Final Frame: Line ends at x=[6,7,8]

Manual Test Instructions:

1. Click the ▶ play button to start animation
2. Watch carefully - do the line coordinates change smoothly?
3. Use the slider to manually scrub through frames
4. Check if early frames vs late frames show different data